Fun in the County Archives

Particularly since they've put so many images on line.
Elgin County Archives is a treasure trove of delights. Images from over 120 years of history. And for us train nuts, lots of old railroad images.
These 2 are a couple of favorites;

The original Canada Air Line bridge and the replacement built by the Grand Trunk crossing the Kettle Creek in St Thomas. This scene is a 5 minute walk from my house.
I'd love to find more history on the replacement project. There are a number of steel trestles on the old Air Line right of way that are similar in design and I'd really like to know if they shut the railway down for the length of time it would have taken to replace all the wooden bridges on the line.
It makes a certain amount of sense given that the option for shoo-flys around the old bridges is pretty limited, if not non-existent.
Today the steel bridges are in such poor repair that the shortlines in the area refuse to cross them and the owner, Canadian National, is showing no inclination to repair them.